Installation and heating method of four-row tapered roller bearing

　　1、The inner race of the four-row tapered roller bearing and the roller journal are generally fitted with clearance.During installation,install the bearing into the bearing box first,and then install the bearing box into the journal.

　　2、The outer ring of the four-row tapered roller bearing and the bearing housing hole also adopt dynamic fit.First,install the outer ring A into the bearing housing.When leaving the factory,the outer ring,the inner ring and the inner and outer spacer rings are printed with the symbol{HotTag},which must be installed in the bearing box in sequence according to the sequence of the character symbols.It cannot be interchanged arbitrarily to prevent the change of bearing clearance.

　　3、After all the parts are installed in the bearing box,the inner ring and the inner spacer ring,the outer ring and the outer spacer ring shall be tightened axially.

　　4、Measure the gap width between the outer ring end face and the bearing housing cover plate to determine the thickness of the corresponding sealing gasket.

　　Heating method

　　Generally,the bearing or separated bearing collar is put into the oil tank containing clean oil to make the oil submerge the bearing and heat evenly.When the temperature reaches 80-90℃,take it out and wipe it clean,and install it while it is hot.The oil tank can be made of 2-3 mm thick iron plate.A perforated iron plate is added at a height of 50-70 mm from the bottom of the tank,and the bearing is placed on the perforated iron plate for heating.The purpose is to prevent impurities in the oil from entering the bearing.However,for bearings with dust covers or sealing rings on both sides,the lubricant has been added in the manufacturing process,so the bearing cannot be heated in the early stage of installation.